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106DB-1 Pulse Doubler PCB

The 106DB-1 Pulse Doubler printed circuit board (PCB) is a goofy little circuit used by a couple of manufacturers in low count rate G-M detector based gamma-ray tools to double the true counts.  The idea is that the higher apparent count rate gives a statistically better looking log, but a superior solution is to slow down the logging speed and increase the time constant thereby yielding more meaningful results.  Nevertheless, we have included the 106DB-1 Pulse Doubler in the 106 Radiation Tool collection though its use is not recommended.

Timing resistors R2 and R4 are turret terminal mounted for ease of selection or change on a fastened board.  The 106DB-1 is bond kill ready for use with the 106BK-2 (or the appropriate pulse output from the UBK-4).  The 106DB-1 PCB is jumper configurable to be compatible with either armor / chassis negative or armor / chassis positive line power.  It requires only a single 10-15 volt power supply to operate.  The 106DB-1 PCB is 0.8 inches wide and mounts on three (3) inch centers.

The 106DB-1 Pulse Doubler PCB is part of the 106 Radiation Tool PCB family.  106 Radiation Tool PCBs can be used to upgrade or repair tools, or an entire electronics section can be assembled from scratch using several PCBs (as in reworking an old tube / Nuvistor tool).  All 106 Tool PCBs use readily obtainable components, which parts will continue to be available for many years to come, and all use convenient turret terminals for wiring connections.  Due to time constraints on maintaining this website, the PCB illustrated below may not be the most recent revision of the board and / or circuit.

106DB-1 Pulse Doubler Board

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09-22-08
Last 10-20-10